11946757381 has 16 divisors (see below), whose sum is σ = 13312918080. Its totient is φ = 10650245760.

The previous prime is 11946757363. The next prime is 11946757387. The reversal of 11946757381 is 18375764911.

It is a cyclic number.

It is not a de Polignac number, because 11946757381 - 2³¹ = 9799273733 is a prime.

It is a super-2 number, since 2×11946757381² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11946757387) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70315 + ... + 169816.

It is an arithmetic number, because the mean of its divisors is an integer number (832057380).

Almost surely, 2^11946757381 is an apocalyptic number.

It is an amenable number.

11946757381 is a deficient number, since it is larger than the sum of its proper divisors (1366160699).

11946757381 is a wasteful number, since it uses less digits than its factorization.

11946757381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240276.

The product of its digits is 1270080, while the sum is 52.

The spelling of 11946757381 in words is "eleven billion, nine hundred forty-six million, seven hundred fifty-seven thousand, three hundred eighty-one".